We had the AN/ARS-6(V) or the earlier cousin of it. Selected units in ArmyAv had them, namely 1/52nd in Korea on the A+ 'hawks and a few Medivacs. That was back in '89 or '90. However, from some of the photos I've seen of DAPS, they seem to be absent, or very hard to see. You have plenty of room as the antennas were more under the crew dog's station.
Your tailboom looks great, however, I have a question, and hopefully if I'm wrong someone will correct me. Your side profile of the tailboom has the panel access to what I remember is the ECS (Environmental Control System) or older High Freq radio shtuph. The only -60's that had that were EH's and the VIP birds. EH's had them because of the DF equipment in back would bake the AC if the ECS would fail (not red X'able, so aircraft was PMC instead of FMC) and the VIP birds because of all the perfumed princes that rode in the back. Again, memory is clouded by age and a misspent youth, so crew dogs or line techs, please correct me if I'm wrong.